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AT Command Set and S-Registers
14-113810-A2-GB30-20 November 1996
Table 14-1
(9 of 12)
3800 Series AT Commands
AT
Command
Front Panel
Branch
Description
&T
n
Tests
&T0
Abort. Stops any test in progress.
&T1 Local Analog Loop.
&T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT).
&T3 Local Digital Loopback test.
&T4 Enables Receive Remote Loopback Response configuration option.
&T5 Disables Receive Remote Loopback Response configuration option.
&T6 Remote Digital Loopback test.
&T7 Remote Digital Loopback with Pattern.
&T8 Local Loopback with Pattern.
&T9 Self-Test.
Test
&T4 and &T5:
Configure\Edit\Tests
&V
n
View Configuration Options
Displays each configuration group within the Active (Operating), Active
(Saved), Customer 1, and Customer 2 configuration areas as well as the
telephone numbers stores in directory locations 1–10.
The output of the &V command, trapped by communications software and
printed, can be used as a configuration worksheet for a modem or network.
&V0 Active (Operating) configuration options.
&V1 Active (Saved) configuration options.
&V2 Customer 1 configuration options.
&V3 Customer 2 configuration options.
&V4 Directory locations 1–10.
None
&W
n
Write (Save to Memory)
Saves the current configuration options in Active (Operating) to one of three
configuration areas:
&W0 Saved to Active(Save).
&W1 Saved to Customer 1.
&W2 Saved to Customer 2.
Configure\Save
&X
n
Transmit Clock Source
&X0
Internal. Modem provides transmit clock source for synchronous data
(Pin 15).
&X1 External. Modem derives external transmit clock source provided on Pin
24 for synchronous data.
&X2 Receive Clock Loop. Modem derives transmit clock source from receive
signal for synchronous data (Pin 17).
Configure\Edit\DTE
Interface
&Z
n=x
Store Telephone Numbers
Modem saves the telephone numbers and dial command modifiers (if any)
entered for
x
(up to 40 characters in length) in Directory Location
n
(1–10).
For example, the command AT&Z1 = 5551234 stores the telephone number
555-1234 into directory location 1.
To clear a telephone number from a memory location, issue the &Z
n
=
x
command without entering a telephone number.
Call Setup\Change
Directory